Turbine-blade.



G. N. F. KNAPE.

TURBINE BLADE.

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HIS ATTORNEY IN FACT.

UNITED OFFICE.

CHARLES N. F. KNAPE, 0F PITTSBURGH, PENNSYLVANIA, ASSIGNOR, BY MESNE AS-SIGNMENTS, TO THE COLONIAL TRUST COMPANY, TRUSTEE, OF PITTSBURGH,LPENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

TURBINE-BLADE.

Application filed October 10, 1910.

To a]? whom 1'1 may concern:

Be itknown that I, CHARLES N. F. KNAPE, a citizen of the United States,and a resident of Pittsburgh, in the county of Allegheny and State ofPennsylvania, have made a new and useful Invention in Tun bine-Blades,of which the following is a specification.

This invention relates to rotor motors and particularly to means forsecuring blades to the blade holding element of said motor.

The invention is illustrated as being employed in connection with aturbine of the impulse type in which there is an impulse disk or bladecarrying element and blades secured to the periphery thereof by means ofcalking pieces or keys.

In the drawings: Figure l is a sectional view through a blade carryingelement showing the blades secured thereto; Fig. 2 is an enlargedfragmentary view of a blade holding element, a blade and a calking pieceinserted between the blade and its carrying element; Fig. 3 is a similarview showing the calking piece peened over after insertion; and Fig. atis a perspective view of one of the blades.

The blade carrying elementmay consist of a disk 5 on a shaft 6, saiddisk being provided with an annular dovetailed slot 7 having a straightface and an inclined face 9, said slot 7 being provided for thereception of the tail piece 10 of a blade 11 The tail piece and theblade are connected by a web 12 providing a slot 13 for the reception ofa flange 14 on the periphery of the disk 5. The tail piece 10 isprovided with a straight face 15 to rest against the face 8 of the disk5 and the end of the tail piece 10 is provided with an inclined face 16which approximately coincides with the angle of inclination of the face9, said faces 9 and 16 being spaced apart. Within the space formed bythe spaces 9 and 16 an insert or calking piece 17 may be interposed anddriven home by any suitable tool, said calking piece 17 being of greaterlength than the depth of the face 16 so that the rojecting end of thecalking piece may be ent over against the shoulder 19 of the tail pieceSpecification of Letters Patent.

Patented May 13, 1913.

Serial No. 586,288.

10 to form a lip, said calking piece being effective in securely wedginthe blade within the groove 7 of the disk 4). Any tendency of the bladeto become loose by centrifugal force during the rotation of the disk 5will be couutm'acted by the resistance of the face 8 to the face 15 andany sidewise movement of the blade will be resisted on the one hand bythe disk 5 and on the other hand by the calking piece 17 so that afterthe two are secured together an efficient tight connection will be made.

Having thus described my invention, what I claim is:

1. The combination with an impulse wheel having an undercut groove and aprojection and a blade having a slot and projection, the projection onthe blade of less width than the width of the slot, the projection onthe blade engaging the groove in the impulse wheel and a projection onthe impulse wheel engaging the slot in the blade and fitting it, andmeans between the blade and the inner wall of the undercut portion ofthe groove for fastening saidblade and impulse wheel together.

2. The combination with an impulse wheel and a blade means for causingthe blade and impulse wheel to interengage and a distortable wedgehaving a bent over end engaging a shoulder on the blade for securingthem together.

3. The combination with an impulse wheel having a dove-tailed groove, ablade having a slot engaged by a portion of the impulse wheel whichfills said slot, a tailpiece on the blade for engagement with theimpulse wheel and a distortable wedge interposed between the tail pieceand one edge of the groove and with the undercut portion of the groove,and having one end bent over a shoulder on the blade.

In testimony whereof, I have hereunto subscribed my name this 6th day ofOctober, 1910.

CHARLES N. F. KNAPE.

W'itnesses:

C. W. MCGHEE, J. A. GiuswoLn.

J I It is hereby certified that in Letters Patent No. 1,061,754, grantedMay 13,1913,

upon the application of Charles N. F. Knape, of Pittsburgh, Pennsyhaniu,for an I .ment in TurbineBlades, an error appears in the printedspecification 33 mg correction as follows: Line 73, for the Wordtitting' rend filling;

f and that the said Letters Patent should he read with this correctiontherein that E the same may conform to the record of the case in thePatent Office.

3 Signed and sealed this 3rd day of June, A. 1)., 1913.

g [SEAL] I (i. C. BILLINGS,

"5 Acting Commissioner of Patents.

